esp32: Bootloader wake deep sleep stub
App can contain a stub program resident in RTC fast memory. Bootloader
will load the stub on initial boot. If the device wakes from deep sleep,
the stub is run immediately (before any other data is loaded, etc.)
To implement a custom wake stub, implement a function in your program:
```
void RTC_IRAM_ATTR esp_wake_deep_sleep(void)
{
esp_default_wake_deep_sleep();
// other wake logic
}
```
... and it will replace the default implementation.
See merge request !78
* master:
app_main: Return type to void
wifi: move type definitions into separate header file
wifi: use default esp_event_send handler in WIFI_INIT_CONFIG_DEFAULT
nvs: Remove flash layout arguments from nvs_init()
Add contributor agreement, update CONTRIBUTING file
Update http_request & https_request examples for new startup flow
Add very simple "hello world" & "blink" examples
Build examples out-of-tree as part of CI process
Examples: Use event groups for waiting until WiFi is associated & ESP has IP
BT example: Enable BT stack in config by default
BT: Relink component on new BT library, auto-initialise submodule if missing
Documentation: Add contributor guide, expand README & add an examples README
Update gitignore for examples
examples: Add https_request example
mbedtls: Add some initial menuconfig options
examples: HTTP request example
component/esp32: udpate wifi lib
component/esp32: modify bool argument name from enable to en
component/esp32: adjust some APIs
esptool: Bump upstream revision
* master: (32 commits)
components/nghttp: rename Makefile to component.mk
components/nghttp: add HTTP2.0 protocol feature
compoenents/esp32: don't alias start_cpu1 to start_cpu0_default
components/freertos: fix a bug with an uninitialised return value
Change application entry point name back to app_main
gitlab-ci: build SSC with matching branch name, if available
components/spi_flash: remove stray level of indentation
components/nvs: fix broken sentences in comment blocks
components/esp32: fix renaming of esp_event_set_cb, minor clean up
components/esp32: remove "_user" part from entry points, weaken start_cpu0/1
Fix a spelling mistake in panic message, add carriage return to stack canary message
components/lwip,esp32: fixes for C++
components/bt: fix compilation, remove ./ from makefile
components/esp32: clarify type of queue in wifi_init_config_t, add default init macro
components/esp32: add ESP_ERROR_CHECK
Event handling refactoring
clean up warnings
components/esp32,bt: fix typos in comments
Startup flow refactoring
Roll back submodule version
...
This change removes implicit WiFi/BT initialization from startup code.
"main" task is started once essential part of startup code is complete.
This task calls application-provided "int main(void)" function, which can call WiFi/BT init functions if necessary.
